Steam-generator.



E. PIELOGK.

STEAM GENERATOR.

APPLICATION FILED JUNE 19, 1913.

Ru 1. 91 m 02 m mw QN H NNI m N m N MN THE NORRIS PETERS 60..PHOTC-LITHO.. WASHINGTON, D. c,

E. PIELOGK.

STEAM GENERATOR.

APPLICATION FILED JUNE 19, 1913.

1,129,600. Patented Feb. 23, 1915.

2 SHEETS-SHEET 2.

HE NORRIS PETERS co. PHOTO-LITHO. WASHING TON. D. C.

EDUARD PIELOGK, OF BERLIN, GERMANY.

STEAM-GENERATOR.

i,129,eoo.

Specification of Letters Patent.

Patented Feb. 23, 1915..

Application filed June 19, 1913. Serial No. 774,613.

To all whom it may concern:

Be it known that I, EDUARD PIELooK, a

subject of the Emperor of Germany, and resident at 14 Landshuterstrasse,Berlin, Germany, have invented certain new and useful ImprovementsRelating to Steam- Generators.

This invention relates to an improvement or modification of asteam-generator for a locomotive boiler or combined firebox andmultitubular boiler, in which means are provided for uniformlydistributing the air stimulating combustion, continuously mixing theheating gases, preventing smoke, the deposit of ashes in the heating orflame tubes and the ejection of incandescent fuel from the chimney.

According to the present modification, the air for the combustion isheated in a chamber, separated by a stepwise depending wall from thesmoke chamber intermediate the firebox and the horizontal multitubularboiler, from which the smoke is conducted through passages anddistributed beneath the fire-grate. The combustion gases strike againstsaid depending wall, are heated to white heat, and when deprived offloating ashes they pass in streams through flame tubes in which theyare repeatedly contracted and caused to whirl in the usual manner.

The modified arrangement is shown in the accompanying drawings, in whichFigure 1, is a longitudinal section of the steam generator. Fig. 2, is across-section. Fig. 3, is a cross-section through the firegrate andash-pit. Fig. 4, is a horizontal section taken on the line CD of Fig. 3.

Between the upright firebox 1 and the horizontal multitubular boiler 2is the known intermediate chamber 3 which does not serve as asteam-generator and in which is contained a wall 4: of refractorymaterial which separates the inner space from the outer walls of saidchamber and leaves channels or passages 5 at both sides for the airsupply to the grate. In the chamber 3 surrounded by the walls 4 there isa depending wall 6 in the form of an arch composed of steps 7 facingtoward the firebox, said arch being composed of refractory materialrendered incandescent by the flames from the fire. The lower part of thechamber 3 receives the ashes separated from the fire gases in strikingthe arch as hereinafter explained. The air-supply for the grate entersthrough a closable aperture 9 and passes along the channels 5 (Fig. 2)and through a door 10 into channels 11 and 12 built in the ash-pit andso beneath the grate 13 (Figs. 1 and 3), thus causing a bettercombustion than is the case with ordinary fire-grates.

The ash-pit is separately shown in Figs. 3 and 4: because of its greatimportance, it being entirely closed during working, cinders beingprevented from falling out and air being supplied from the channels 12to the sides and the middle of the grate. It is advantageous to make theoutlets widerat the ends opposite the inlets so as to insure betterdistribution of the air, and if desired a greater number of distributingchannels may be provided. The air current can be regulated by means ofthe door 10 from the exterior. For the supply of air above the grate,especially when coal containing much carbureted hydrogen is used, thereare provided distributing nozzles 14: along the walls of the firebox,said nozzles controlled by a slide extending along the entire wall ofthe firebox. Having thus provided the most advantageous arrangements forthe combustion, the fire-gases in leaving the firebox 15 have to passthrough an opening 16 calculated to give the smallest cross-section fora maximum velocity of the gases so that the latter strike with greatintensity against the arch 7. This violent impact with the steps of thearch causes the gases to mix intimately and at the same time to separateout the solids carried with the gases, the solids falling into thecollecting space 8 of the chamber 3. With this arrangement completecombustion with less smoke is obtained, while emission of burning fuelfrom the chimney and the choking by ashes of the heating or flame tubesare practically avoided. The air entering the opening 9 becomes heatedin the space 18 by the upper brickwork and along the channels 5 in theside wall 4: the heating efiect being increased by iron plates arrangedbetween projecting parts 19 (Fig. 2), while at the same time the aircools the walls and so causes same to last longer than they wouldotherwise. The bricks for lining the walls of the intermediate chamberare seatedin suitable openings 20 formed in the plate 22 which carriesthe refractory material see Figs. 1 and 2. It is advantageous to makeone or more of the rows of projecting bricks more protruding than theothers so that such protruding bricks 23 may cause whirls in the aircurrent and thereby facilitate the heating 0]": the same.

I claim 1. In a steam generator of the fire tube type the combinationwith a fire box and a fire tube boiler lying in spaced relation thereto,of a chamber between said firetubes and said fire box, a second chambersurrounding the first named chamber, means for supplying outside air tothe last named chamber and connections leading from the last namedchamber to a point beneath the grate.

2. In a steam generator of the fire tube type the combination with afire box and a fire tube boiler lying in spaced relation thereto, of achamber between said fire tube boiler and said fire box, a secondchamber surrounding the first named chamber, means for supplying outsideair to the-last named chamber and connections leading from the lastchamber to a point beneath the grate and a depending bafiie Wallextending downwardly from the top of the first named chamber andterminating short of the bottom of said chamber.

3. In a steam generator or the fire tube type the combination With afire box and a fire tube boiler lying in spaced relation thereto, of achamber between said fire tube boiler and said fire box, a secondchamber last chamber to a point beneath the grate and a depending baifiewall extending downwardly from the top of the first named chamber andterminating short of the bottom of said chamber, stepped face.

t. In a steam generator of the fire tube type the combination with afire box and a horizontal fire tube boiler lying in spaced relationthereto, of a chamber between said fire tubes and said fire box having adepending baflle wall, a second chamber surrounding the first namedchamber, means for admitting air at the top of said second chamher, acompartment beneath the ash pit of said wall having a the fire box withwhich said second ChitlTlr ber has communication, and discharge conduitsleading upwardly from said compartment and arranged to discharge heatedair beneath the grate of the fire box.

In testimony whereof I have set hereuntfl my hand in presence of twowitnesses.

EDUARD 'PinLocx.

IVitnesses VOLDEMAR I-IAUr'r, HENRY HAsrER.

Copies of this patent may be "obtaincd'for-five cents each, byaddressing the Commissioner of latents, -Washington, D. G.

